mjhjmtu

I cannot seem to get the default NAT to work. It does not assign a (DHCP) IP to the guest (centos) using the network. From what I can tell the network is up and running. I am not familiar enough with this to understand what I am missing (or doing wrong) and I am not entirely sure what info to provide for help. If I use the macvtap network which connects with the physical I can get an internet connection no problem. Which solves 1/2 my issue, the other 1/2 is that I also want to have host <-> guest communication as well.

Antergos Linux 4.18.9-arch1-1-vfio

brctl show:

bridge name bridge id STP enabled interfaces
docker0 8000.0242e1374032 no 
virbr0 8000.5254004bc729 yes virbr0-nic

sudo virsh net-list:

 Name State Autostart Persistent 
--------------------------------------------
 default active yes yes 

ip addr:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
 inet 127.0.0.1/8 scope host lo
 valid_lft forever preferred_lft forever
 inet6 ::1/128 scope host 
 valid_lft forever preferred_lft forever
2: enp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
 link/ether 70:85:c2:45:d7:bf brd ff:ff:ff:ff:ff:ff
 inet 192.168.1.6/24 brd 192.168.1.255 scope global dynamic noprefixroute enp6s0
 valid_lft 67028sec preferred_lft 67028sec
 inet6 fe80::f327:61da:4f77:d716/64 scope link noprefixroute 
 valid_lft forever preferred_lft forever
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
 link/ether 02:42:e1:37:40:32 brd ff:ff:ff:ff:ff:ff
 inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
 valid_lft forever preferred_lft forever
31: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
 link/ether 52:54:00:4b:c7:29 brd ff:ff:ff:ff:ff:ff
 inet 192.168.100.1/24 brd 192.168.100.255 scope global virbr0
 valid_lft forever preferred_lft forever
32: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
 link/ether 52:54:00:4b:c7:29 brd ff:ff:ff:ff:ff:ff
34: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master virbr0 state UNKNOWN group default qlen 1000
 link/ether fe:54:00:2d:44:ab brd ff:ff:ff:ff:ff:ff
 inet6 fe80::fc54:ff:fe2d:44ab/64 scope link 
 valid_lft forever preferred_lft forever

ifconfig:

docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
 inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
 ether 02:42:e1:37:40:32 txqueuelen 0 (Ethernet)
 RX packets 0 bytes 0 (0.0 B)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 0 bytes 0 (0.0 B)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp6s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.1.6 netmask 255.255.255.0 broadcast 192.168.1.255
 inet6 fe80::f327:61da:4f77:d716 prefixlen 64 scopeid 0x20<link>
 ether 70:85:c2:45:d7:bf txqueuelen 1000 (Ethernet)
 RX packets 3052971 bytes 4501201281 (4.1 GiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 1011201 bytes 125025258 (119.2 MiB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
 device memory 0xfe500000-fe51ffff 

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
 inet 127.0.0.1 netmask 255.0.0.0
 inet6 ::1 prefixlen 128 scopeid 0x10<host>
 loop txqueuelen 1000 (Local Loopback)
 RX packets 88398 bytes 5896464 (5.6 MiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 88398 bytes 5896464 (5.6 MiB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.100.1 netmask 255.255.255.0 broadcast 192.168.100.255
 ether 52:54:00:4b:c7:29 txqueuelen 1000 (Ethernet)
 RX packets 216 bytes 32270 (31.5 KiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 6 bytes 252 (252.0 B)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet6 fe80::fc54:ff:fe2d:44ab prefixlen 64 scopeid 0x20<link>
 ether fe:54:00:2d:44:ab txqueuelen 1000 (Ethernet)
 RX packets 26 bytes 4778 (4.6 KiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 183 bytes 11380 (11.1 KiB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

default xml (sudo virsh net-edit default):

<network>
 <name>default</name>
 <uuid>a755b367-26bf-4282-993e-f8404aee3a89</uuid>
 <forward mode='nat' />
 <bridge name='virbr0' stp='on' delay='0' />
 <mac address='52:54:00:4b:c7:29' />
 <domain name='default />
 <ip address='192.168.100.1' netmask='255.255.255.0'>
 <dchp>
 <range start='192.168.100.128' end='192.168.100.254' />
 </dchp>
 </ip>
</network>